It is almost comical to look at that original rendering now. Thankfully they didn't stick to that exact concept. Changing the direction was huge, but I much prefer the stairs/ramps being enclosed in the stadium than having that giant cylindrical thing at the corner of the stadium.
The early rendering also appeared to not have open concourses. In addition, I recall reading recently (can't remember where) that the original design was to only have a brick wall on one side of the stadium with the rest of the structure exposed. That would have been cheap and tacky-looking.
Then again, with all that said, it still would've been better than the Dome.